qtcad.device.poisson_linear module
Linear Poisson solver.
- class qtcad.device.poisson_linear.Solver(d, solver_params=None)
Bases:
poissonfem.poisson_linear.Solver
Finite element solver for linear Poisson’s equation, given a charge density stored in the ‘rho’ attribute of the input device.
- Attributes
d (device object) – The device for which to solve Poisson’s equation
tol (float) – Tolerance on the potential to use in a calculation if method is iterative.
maxiter (int) – Maximum number of iterations in a self-consistent loop if method is iterative.
- __init__(d, solver_params=None)
Constructor of the solver class.
- Parameters
d (device object) – Device for which Poisson’s equation must be solved.
solver_params (SolverParams obj or None, optional) – The parameters of the solver.
- solve()
Solves the linear Poisson equation.
- class qtcad.device.poisson_linear.SolverParams(inp_dict=None)
Bases:
poissonfem.poisson_linear.SolverParams
Parameters to pass to a linear Poisson solver.
- Attributes
tol (float) – Tolerance to use in an iterative solution, in volts. Default: 1e-6.
maxiter (int) – Maximum number of iterations in an iterative solution. Default: None (eventually None is passed to the linear system solver, unless the solver does not accept None as input).
method (str) – The method to use to solve the linear problem: “direct” or “iterative”. Default: “iterative”.
- __init__(inp_dict=None)
Constructor of the SolverParams class.
- Parameters
inp_dict (dict, optional) – Dictionary specifying certain solver parameters to be used instead of their default values.